:root {
  --bg: #0a0e1a;
  --bg-elevated: #131826;
  --bg-hover: #1a2236;
  --border: #1f2937;
  --border-strong: #374151;
  --text: #e5e7eb;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --accent: #00ff9d;
  --accent-dim: #00cc7d;
  --accent-glow: rgba(0, 255, 157, 0.15);
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #38bdf8;
  --radius: 8px;
  --radius-lg: 12px;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --container: 1100px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(0, 255, 157, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(56, 189, 248, 0.04) 0%, transparent 40%);
  background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--accent-dim); }

img { max-width: 100%; display: block; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* === NAV === */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container);
  margin: 0 auto;
}

.nav-brand {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -.02em;
}

.nav-brand .accent { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-size: .92rem;
  font-weight: 500;
  transition: color .15s;
}

.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a.active { color: var(--accent); }

.lang-switch {
  display: flex;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: .82rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px;
}

.lang-switch a {
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--text-dim);
  font-weight: 500;
}

.lang-switch a.active {
  background: var(--accent);
  color: var(--bg);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
}

/* === HERO === */
.hero {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}

.hero-prompt {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: .9rem;
  margin-bottom: 16px;
  opacity: .9;
}

.hero-prompt::after {
  content: '_';
  animation: blink 1s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -.03em;
}

.hero h1 .accent { color: var(--accent); }

.hero-role {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  color: var(--bg);
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-avatar {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  padding: 4px;
  background: var(--bg-elevated);
  position: relative;
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  transform: scale(1.08);
  clip-path: circle(46% at 50% 50%);
}

.hero-avatar::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), transparent 50%);
  z-index: -1;
  opacity: .4;
}

/* === SECTIONS === */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -.02em;
}

.section-tag {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: .85rem;
  margin-bottom: 8px;
  display: block;
}

.section-desc {
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 700px;
}

/* === CARDS === */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all .2s;
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.card-icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: .8rem;
  margin-bottom: 12px;
  letter-spacing: .05em;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  font-weight: 600;
}

.card p {
  color: var(--text-muted);
  font-size: .94rem;
}

.card ul {
  list-style: none;
  margin-top: 12px;
}

.card ul li {
  color: var(--text-muted);
  font-size: .9rem;
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
}

.card ul li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}

/* === TIMELINE === */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 36px;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--accent);
  margin-bottom: 4px;
}

.timeline-role {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.timeline-company {
  color: var(--text-muted);
  font-size: .95rem;
  margin-bottom: 12px;
}

.timeline-list {
  list-style: none;
}

.timeline-list li {
  color: var(--text-muted);
  font-size: .94rem;
  padding-left: 18px;
  position: relative;
  margin-bottom: 6px;
}

.timeline-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: .8rem;
}

.timeline-tech {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-dim);
}

/* === SKILLS GRID === */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.skill-block {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.skill-block h4 {
  font-size: .92rem;
  font-family: var(--font-mono);
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: .02em;
}

.skill-block .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-family: var(--font-mono);
  font-size: .76rem;
  padding: 3px 8px;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  color: var(--text-muted);
}

/* === CERTS === */
.cert-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

.cert {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: border-color .15s;
}

.cert:hover { border-color: var(--accent); }

.cert-badge {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.1rem;
}

.cert h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.cert p {
  color: var(--text-muted);
  font-size: .88rem;
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* === ACHIEVEMENT HIGHLIGHT === */
.highlight {
  background: linear-gradient(135deg, var(--bg-elevated), var(--bg));
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 24px;
  position: relative;
  overflow: hidden;
}

.highlight::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.highlight-label {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: .05em;
}

.highlight h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.highlight p {
  color: var(--text-muted);
  font-size: .94rem;
}

/* === CONTACT === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .95rem;
  transition: border-color .15s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
  font-family: var(--font-sans);
}

.social-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.social-list a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 500;
  transition: all .15s;
}

.social-list a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateX(4px);
}

.social-list .label {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-dim);
  margin-left: auto;
}

/* === FOOTER === */
.footer {
  padding: 40px 0 32px;
  text-align: center;
  color: var(--text-dim);
  font-size: .88rem;
  font-family: var(--font-mono);
}

.footer .accent { color: var(--accent); }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 65px;
    right: 0;
    background: var(--bg-elevated);
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    transform: translateX(100%);
    transition: transform .2s;
    min-width: 200px;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: block; }

  .hero { padding: 50px 0 40px; }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }
  .hero-cta { justify-content: center; }
  .hero-avatar { width: 160px; height: 160px; margin: 0 auto; }

  .section { padding: 48px 0; }
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* === UTIL === */
.prose p { margin-bottom: 16px; color: var(--text-muted); }
.prose strong { color: var(--text); }
.text-muted { color: var(--text-muted); }
.mt-4 { margin-top: 32px; }